Leader of evil movement creates strong feeling (7)
I believe the answer is:
emotion
'strong feeling' is the definition.
(I've seen this in another clue)
'leader of evil movement' is the wordplay.
'leader of' indicates taking the first letters.
'movement' becomes 'motion' (synonyms).
The initial letter of 'evil' is 'e'.
'e'+'motion'='EMOTION'
'creates' acts as a link.
(Other definitions for emotion that I've seen before include "Strong feeling of joy, fear etc" , "Strong desire" , "Fear possibly" , "Hatred or love, say" , "Feeling, say love or hate" .)